Your head contains four sets of sinuses located throughout your face. They are located above your eyes, behind your nose, and behind the cheekbones.

Your sinuses are air-filled cavities surrounded by bone and lined with a mucous membrane. Air travels to and from your sinuses through small airways. Unlike your middle ear, which requires special attention to equalize, normal and healthy sinuses equalize automatically as you breathe, and methods such as the Valsalva maneuver have no effect on sinus pressure.